We all know that smoking is bad for our health. But how bad is it? The answer is very bad, as a life changing, in fact. However, everyone also knows someone who smoked all their adult life, never got lung cancer or a respiratory disease of any kind and lived to a ripe old age. George Burns, the famous comedian, who lived to be 100 hundred years old, often remarked "I smoke ten to fifteen cigars a day. At my age, I have to hold on to something".